Cultivator-tooth



C. A. MARTIN.

l u nvnomoon. l MPIQ` TION FILED JAN. 9, 1920.

1,345,209, Patented June 29, '1920.

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UNITED STATES 4PrxrEN-.T o.I.--l,c:E.l

CHARLES A. MARTIN, OF CONGRESS HEIGHTS, DISTRICT F COLUMBIA.

CULTI'V'ATOR-TOOTH.`

To all whom t may concern:

Beit known that I, CHARLES A. MARTIN, a citizen of the United States, residing at Congress Heights, `District of Columbia, have invented certain new and useful. Improvements in Cultivator-Teeth, of which thefollowing is a specification. i n

This inventionrelates to improvements in cultivators and more particularly to the fas-` tening means for the teeth thereof.

Briefly stated, this invention aims to provide-improved means for connecting a cultivator tooth to its shoe in a highly lefficient andexpeditious maenner.v In certain cultivators no w lin use, the teethY are secured to the shoes by fastening bolts extending through the teeth and the shoeand as the result of continued l,use the `fastening bolts become rusted and consequently diflicult to remove. Also'the round heads of the fastening bolts do not effectively grip the cultivator teeth thereby allowing the bolt topturn with the nut when a wrench is applied to the nut for.r

the ,purposeof removing the same. Under such conditions it is frequently .necessary to.

break the bolt yand thev tooth when Vit is desired to remove the tooth preparatory to re-.

placing-the same. 1

An important object of this invention is therefore -toprovide means whereby the cultivator teeth maybe securely attached to theshoe without the necessity of employing bolts.

A further object oftheinventionis to provide a cultivator tooth havin .means whereby the same may be detacha ly connected to the shoe of a cultivator jwithout the necessity of -altering vthe construction of the shoe. l n 'A A lfurther objectof this invention is to provide a cultivator'. tooth having its rear side provided with a U-shaped shackle adapted to receive the forwardportion of the Vcultivator shoe and novel means for directing the shoe intosaid shackle. l

A further object oftheinvention is to providega cultivator tooth having novell means wherebythe same .maybe detachably` securedto the shoein such a manner that the same may be readilyV 'reversed orl removed wheny the active blade of the tooth becomes worn or otherwise unfit `for furtheruse.` i A further Aobject ofthe invention 1s to provide a cultivatorvtooth and fastening Specification of Letters Patent.

`of theffollowing description.

Athrough the `improved. cultivator tooth ap-l 0 plied,

.shoe adapted vfor use in connection withthe in the ordinary cultivator receives a fasten- PatentedV June 29, A1920;

Application led January 9,k 1920. Serial No. 350,277.

i meansrtherefor, which, are simple, desirable in use v,andcheap to manufacture. e

Other objects and ad'vanta esV of the invention will be apparent "during the course Fig-4 is al fragmentary perspective of the.

form of the inventionr illustrated in 3, and

ing key adapted for use in V connection with, the form of the Fig. 3. n Y y In the drawing wherein for the purpose vinvention illustrated in ofgillustration are shown several preferred embodiments ofthe invention, the numeral, lO'generally designates the shoe orstandardf of a. cultivator and which is longitudinally curved toward its free end, as illustratedy in f Fig. 2.` The-lower portion of the shoe is provided withfa transverse opening 11 which ing bolt adapted for securingfthe cultivator tooth to the shoe. The tooth herein shown is designated generally bythenumeral 12.` andhas itsend portions tapered and beveled, as indicatedat 13, so as to provide Vpenetrating elements 'at each of' its ends whereby. the tooth may be reversed when one of the. ends becomes-worn or otherwise'un'it for further use. The rear side of the culti` vator toothnis providedfwith a squared lug 100 14 located intermediateI its ends and adapted to be received within the opening l1 of the shoe. With particularl reference to Figs. 1`

and 2, it will be best observed that the U- shaped shackle or retaining lmember 15 'is-105 Vprovidedwith a pair of spaced parallel side arms welded to the rear side ofthe tooth `andja transverse connecting or biohtlportion Y 16 arranged outwardly from the-Tugv 14; j n

When the forward portion of the shoe 1Q 110 F igf is a perspective of a wedge yorlockl f is received within the U-shaped shackle 16, the lug 14 is inserted into the transverse opening 11 so that the rear side ofthe cultivator tooth is brought flatly into contact with the front side of the shoe. When the tooth andthe shoe have been positioned as illustrated in Fig. 2, a .longitudinally tal-I pered wedge 17 is driven between the rear vside of the shoe and the connecting portion Vhead 18 which` projects outwardly from the shank of thewedge may also be engaged by a hammer' when it is desired to remove the wedge and therefore it is not necessary to strikeand possibly flatten the lower end of Vthe wedgeV upon removing'v the same. 25

The rear side of the cultivator tooth is proyided at points spaced outwardly from the (lug 14 with pairs of guiding lugs 19 preferably welded to the tooth. The lugs 19 serve toguide thel forward portion of the shoe 'into 'the-shackle, thereby resulting in .the expeditious attachment of the tooth to the lower portion of the shoe. The lugs 19 alsov serve. to take up the side thrust on vthe 'tooth so as Vnot to impart any great 'amount of strain to the parallel arms of the U-shaped shackle. With reference to Fig. 3, it will be observed ythat the space between the'lugs of each pair of lugs is somewhat lessthan thefspace between the parallel arms of the -U-shaped shackle so that when the tooth is, applied to the shoe theparallel arms of the shackle .will be spaced from they adj acent `sides of the shoe. This allows air to enter the space between the adjacent sides of the parallel arms and the shoe with the result that erosion and rusting of the parts are prevented( i -In the form of the invention illustrated in Figs. 3, 4and 5, the lower portion of the tapered wedge 17 is provided with a longi tudinal incision 20 which forms a pair-of,

partly'severed tongues 21.- The lower portion ofthe shoe 10 is formed on its lowerl sidewith an outwardly extending shouldery 22 having its upper side tapered to aV point, as indicated at 23. During the downward Vmovementof the wedge the tongues 21 of the same are spread laterally by the tapered upper portion-of the outstanding shoulder 22 for preventing the accidental loss or dis-A placement ofthe wedge and thel cultivator tooth. I

In applying the tooth to the shoe, the tooth isV moved upwardly so that the lower portionofthe lshoe will be'received within the shackle. Byv a slight rearward movenient of the'tooth, the lug 14 may be inserted within the transverse opening 11 and as set forth above, the guide lugs`v 19 serve to direct the lower portion of the shoe into the shackle for facilitating the attachment of the tooth to the shoe. When the lug 14 has been received within the transverse 'Y opening 11, the'taperedwedge 17 is driven to the limit of its movement into the opening formed between the rear side of the shoe and the adjacent side of the shackle. By reason o f the frictional contact between the tooth and theshoe, the tooth will not be.

likely'to become loosened as the result of continued use. The pairs of spaced lugs 19 also strengthen the connectionbetween the tooth and the shoe since they serve to take up the side thrust'on thetooth. By employing a wedge having the tongues 21 the accildental displacement or'l'oss of the wedge is rendered extremely unlikely.- With particular reference't'o Fig. 8, it will be noted that after being spreadl laterallyY thetongues 21 engagev theunder side :of the shackle 15,. p With reference-to the foregoingV descrip-A tion and the, accompanying drawing it will be *observed that the blade may berreadily l removed when desired for the purpose of reversing 'or replacing the same. It will also- .95. Vbe noted that lthe necessity of employing bolts for securingthe tooth to the shoe is may at any time be removed without inconvenience or excessive work.- f

.t is'to be understood that the are to be taken as preferred Vembodi'ments of' the same and that such minor changes in construction and arrangement 'of parts may labsolutely dispensed with so that the tooth Y '100.' Y p t forms of the invention herewith shown anddescribedY be made as will remain within the spirit of the invention and thev scope of what Y f claimed.

Having thus: described the invention,

`what is claimed as'new is: l l

1. Inacultivator, thecombination with ai `tooth havinga lug and aV U-shaped shackle provided with parallel side' arms arranged on opposite sides ofsaid lug, of-a'support extendedthrough-said shacklefand having an openingreceiving said lug, and a wedge'V engaged with said shackle'andsaid sup-4 port, said tooth being provided Vwith means l for guidingfsaid support into said shackle.

2. In-'a cultivator, the combination :with aVAA tooth having a U-shaped shackle onits rear j face and pairs of spaced guide and bracing lugs on opposite sides ofl said shackle Y-at points spaced from the same, of a support. 'i

extended through-said shackle and engaged by said lugs, and means forfdetachablyfse-Y curing said support iii-engagement with"V said shackle.

a lA @uiavator toui including-1 a body, a l

lug arranged; on the -rear side of the body, 130v CIY a U-shaped shackle secured to the rear side of the body and provided With parallel side arms arranged on opposite sides of said lug in spaced relation to the same, and pairs of guide and bracing lugs formed on the rear side of said tooth at points spaced from said shackle whereby said pairs of lugs will engage the sides of the shoe upon being inserted through said shackle for spacing said sides from the arms of said shackle.

4. In a cultivator, the combination with a tooth having a lug and a U-shaped shackle arranged on its rear side, said U-shaped `shackle comprising a pair of parallel side arms and a connecting portion having its inner side curved at its ends, of a shoe extending through said shackle and in contact with the rear side of said blade, and a longitudinally tapered Wedge arranged between the rear side of said shoe and the connecting portion of said shackle, said tooth being provided With pairs of spacedV lugs adapted to engage the sides of said shoe for spacing the same from the sides of said shackle.

5. In a cultivator, the combination With a tooth'having a U-shaped shackle on its rear side and lpairs of spaced lugs arranged adjacent the ends of said tooth, of a support extending through said shackle and engaged by said lugs, a Wedge inserted between the lower portion of said support and said shackle and having its lower portion provided with a pair of tongues, and an outstanding shoulder formed von the lower por'- tion of said support and adapted to be engaged by said tongues for spreading the same.

, In testimony whereof I alix myv signature. CHARLES A. MARTIN. [1.. s.] l 

